package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImp implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    @Override
    public User login(UserLoginDTO userLoginDTO) {
        String Openid = getOpenid(userLoginDTO.getCode());
        User user = userMapper.getByopenID(Openid);
        if(Openid == null){
            throw new ArithmeticException(MessageConstant.USER_NOT_LOGIN);
        }
        if(user == null){
            user = new User();
            user.setOpenid(Openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.save(user);
        }
        return user;
    }




    private String getOpenid(String code){
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String Openid = jsonObject.getString("openid");
        return Openid;
    }
}
